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send data to a php file using getJson method in jQuery

var comObj = {
        'name' : 'anony',
        'info' : 'Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean m'
    $.getJSON('comData.php',comObj,function(data) {
        var commentStr = '<ul class="list-unstyled">';
        $.each(data,function (i,item) {
            // body...          
            commentStr += '<li class="media my-4">';
            commentStr += '<img class="d-flex mr-2 img-thumbnail" src="https://www.gravatar.com/avatar/' + md5(item.name) + '.jpg?d=identicon&s=40" />';
            commentStr += '<div class="media-body">';
            commentStr += '<h5 class="mt-0 mb-1">'+item.name +'</h5>';
            commentStr += '' + item.comment_data + '</div></li>';           
        commentStr += '</ul>';

now i want to retrieve the data in comObj in the php file named comData.php so how to retrieve this data in php